Sanae Takaichi’s position as Japan’s prime minister rests on the Liberal Democratic Party’s historic February 2026 landslide victory, which delivered a two-thirds supermajority in the lower house and reinforced her mandate after taking office in October 2025. Recent approval ratings near or above 50 percent, combined with scheduled cabinet and party leadership adjustments focused on continuity rather than upheaval, have limited internal challenges ahead of the next leadership contest. Traders assign a 91.5 percent probability that she remains in office through 2026, reflecting the structural advantages of supermajority control and the absence of immediate resignation triggers such as coalition collapse or sustained polling collapse.